You are in a world where there are only 2 assets: gold and stocks. You are interested in investing your money in one, the other or both assets. Consequently, you collect the following data on the returns on the 2 assets over the last 6 years. Gold Stock market Average return 8% 20% Standard deviation 25% 22% Correlation -0.4 a. If you were constrained to pick just one, which one would you choose? b. How would a portfolio composed of equal proportions in gold and stocks do in terms of mean and variance?